Process for the production of an insulating material for electrical purposes.



UNITED STATESPA OFF-ICE JOHANNES MEYENBERG,OFQBAARJQNEAR ZUG,SWITZERLAND. PROCES S FOR THE PRODUCTION OF AN INSULATING MATERIAL FOllELECTRICAL PURPOSES.

No; 848,1 1?. f

- atin "Material for Electrical Purposes, of

whic the following'isfa specification.

The present invention relates toan insus latinganaterial and the processof making the same, said materialbeing especially adapted for electricalinsulation, both for high. and low tension. r

i 5 Animal filan1entssuch as hair,wool, sponge cuttings, silk, and thelike are reduced to small pieces, piled in heaps, moistened, andfermentation allowed to set in. The heat developed by the fermentationshould not exceed about Celsius. The fermented mass is then treated Witha solution of'an alkaline lye and stirred until homogeneous and ,thentreated with a coagulant, as a suitable sulfate-as alum, aluminiumsulfate,'calciurn sulfate, &c.or with a solution of an acid salt 'orchromium, whereby :the natural cement of thesubstances, such as gelatin,is dis solved out and a fiocculent precipitate is formed The liquid withthe neutralized remaining free alkali is then decanted or ressed I offfrom-the remaining mass, and tie filaments orfibers and naturaljcementsiare again .inechanically, combined. For the intimate me'chanicaluniting it is found advisable to By the precipitacerite sixty-twir andTone-half per cent. carnauba wax, 6.25-per cent. colophony, andf6-25percent. of linseed-oil or almond-oil. This res ncomposition-is mixedeither as a solid in a pulverulent form with the-product obtained ytreating the filaments or the latter is im pregnated with the hot meltedresin composition, thereby increasing the insulating r0per ties'and atthe same time renderingt e mix-- ture capable of being.- worked up intoshape Specification of Letters Patent. Application. filedflDecember a,1906. Serial No. 290.293-

Patented March 2c, 1907.

for ,use. The mass thus obtained is pressed into plates or other desiredshapes at the Y usual atmospheric temperature and then subjected to apressure 0 from one hunderd to six hundred tons per square meter at'aheat ofat least 80 Celsius for better distributing the intermingledingredients, which operation may be. advantageously effected by means ofheated plates. In order to rotect the product obtained against comustion and to make it' moistu'raprodf, it is soaked.

with a silicate solution, to Which is added carbohydrate compounds, suchas casein, dextrin, and the like. Y

The fibrous materiaI may be impregnated with the resin compound afterbeing molded,

if so "desired, and the fact that it Will combine and be absorbed mostlybythe surface of the molded article is not prejudicial be cause byreason of the subsequent pressure and heat the homogenity of the mass ispro moted.

' I claim' a I 1. The process of producing insulating material. whichcomprises subjecting animal filaments to fermentation, then treatingWith an alkaline lye, precipitating the natural cements by a coagulant,removing resultant liquid therefrom, "then mixing 'the residue andfinally-shaping the same. i

2-. The process of producing insulating material WillGll comprisessubjecting animal filaments to fermentation, mixing the fermented masswith an alkaline lye, treating the resultant mixture with a solution ofa suitable sulfate to precipitate the natural cements, removing theresulting liquid from the mass, mixing the residue and molding the sameunder pressure.

3. The process of producing insulating material which comprisessubjecting animal hair to fermentation and thereby generating heat,treating the heated fermented mass with an alkaline lye, mixingtherewith sul- LOO fate of aluminium, removing the resulting 1 liquidand adding to the sameczocerite IIO resin mixture, molding the same,then com I pressing the molded mass at a temperature above normal, and.treating the compressed mass with a fire-proofing composition.

- 5. The process of reducing insuletirig material comprising 'su gectmghair, sponge,

silk or other animal filaments to fermentetion, treating the fermentedmess with an alkaline lye, mixing therewith e coagulant to preci itatethe natural cements,

ressi'ng out the liquid and mixing the resi ns), ediling andimpregnetihg the prod not with a silicate solution mix-ed with acarbohydrate.

6; A1 insulating materiel eompri lug fermented enim el fibers mixed withtheir coaguietotl natural cements, a resin mixture, and a fireproofingsilieate.

In testimony-whereof I' have signed my name to thisspeeificetio'n in thepresence of two subscribing Witnesses.

JOHANNES MEYIENBERG.

Witnesses:

A. LIEBERKNE HT E. BLUM.

